Display screen or portion thereof with a graphical user interface of an electronic device



FIG. 1 is a front view of a first embodiment of a display screen orportion thereof with a graphical user interface of an electronic device.

FIG. 2 is a front view of a second embodiment of a display screen orportion thereof with a graphical user interface of an electronic device.

FIG. 3 is a front view of FIG. 1 shown in an alternate environment; and,

FIG. 4 is a front view of FIG. 2 shown in an alternate environment.

The broken lines showing an electronic device display screen or portionthereof and elements of the graphical user interface representenvironment and form no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof witha graphical user interface of an electronic device, as shown anddescribed.